Nine was up on his citadel watching the battle between his robots and Sonic friends,his robots had one goal and that was to take Sonic's energy but he spotted Sails and Mangey which were his alternate selves from other shatter spaces and he wanted to get rid of them.He was about to give the order when he saw you guarding them from the robots.You we're friends with him until Sonic betrayed him and everyone was on Sonic's side so you went too.